224541021 has 4 divisors (see below), whose sum is σ = 299388032. Its totient is φ = 149694012.

The previous prime is 224541007. The next prime is 224541041. The reversal of 224541021 is 120145422.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 224541021 - 2⁶ = 224540957 is a prime.

It is a super-2 number, since 2×224541021² = 100837340223444882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (224541041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37423501 + ... + 37423506.

It is an arithmetic number, because the mean of its divisors is an integer number (74847008).

Almost surely, 2^224541021 is an apocalyptic number.

It is an amenable number.

224541021 is a deficient number, since it is larger than the sum of its proper divisors (74847011).

224541021 is an equidigital number, since it uses as much as digits as its factorization.

224541021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74847010.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 224541021 is about 14984.6928897459. The cubic root of 224541021 is about 607.8063472096.

Adding to 224541021 its reverse (120145422), we get a palindrome (344686443).

The spelling of 224541021 in words is "two hundred twenty-four million, five hundred forty-one thousand, twenty-one".